Ionic bonds are referred to two elements/molecules that form when one is classified as metal and another is classified as non-metal. Covalent bonds are two non-metal elements that bind together. They differ in several ways. Ionic bonds have a better force of attraction due to the metal element, whereas covalent bonds are formed using the Van de Waals force (which makes it weaker). Ionic bond also has higher melting and boiling point because of its force of attraction as compared to the covalent bond. Similarly, ionic bonds react to electricity where covalent does not.
When people burn fossil fuels it feeds into global warming. Global warming is melting the permafrost in these tundra regions causing them to collapse.
A. Elevation is the answer
It is a plant so it lives as long as you take care of it.